Zend has released a new product for anyone that's ever tried to run PHP on a Windows platform - the Zend WenEnabler.

According to their website: The Zend WinEnabler is a new product specifically designed to enable PHP to run in Windows environments. In terms of stability and performance, WinEnabler is the only solution that brings PHP on Windows up to par with PHP on Linux. [...] The Zend WinEnabler is as stable as CGI because it opens PHP as an external process to the Web Server. Even if the PHP crashes, the Web Server stability is maintained. The Zend WinEnabler eliminates the need for the unreliable IIS and Apache PHP modules, because it opens several PHP processes simultaneously. It saves time and CPU by utilizing a pool of PHP processes instead of launching PHP each time.

They have a trial download so you can give it a shot, but a lot of the claims they make seem a little silly to me. The whole "on par with PHP on linux" thing I don't think will ever be true. I'd be interested to see some real benchmarks on this software versus a normal PHP install on Apache for Windows (surprises me too, but it says it's compatible)...